The SetBkMode function sets the background mix mode of the specified device context. The background mix mode is used with text, hatched brushes, and pen styles that are not solid lines.
int SetBkMode(
HDC hdc, // handle of device context
int iBkMode // flag specifying background mode
);
Value | Description |
---|---|
OPAQUE | Background is filled with the current background color before the text, hatched brush, or pen is drawn. |
TRANSPARENT | Background remains untouched. |
If the function succeeds, the return value specifies the previous background mode.
If the function fails, the return value is zero.
Windows NT: To get extended error information, call GetLastError.
The SetBkMode function affects the line styles for lines drawn using a pen created by the CreatePen function. SetBkMode does not affect lines drawn using a pen created by the ExtCreatePen function.
The iBkMode parameter can also be set to driver-specific values. GDI passes such values to the device driver and otherwise ignores them.
Windows CE: The iBKMode parameter is stored internally as a single byte.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Requires version 1.0 or later.
Header: Declared in wingdi.h.
Import Library: Use gdi32.lib.
Painting and Drawing Overview, Painting and Drawing Functions, CreatePen, ExtCreatePen, GetBkMode